Two Canadians plan to lock themselves in dark shipping containers and run as far as they can in 24 hours

When John Witzing, a police officer from Peterborough, Ont., carries water, a change of clothes and a carefully curated selection of fatty food into a shipping container near the banks of Lake Tahoe in northern California on Friday, his goal will be to run more than 150 km on the treadmill inside before he returns to the wider world.